The ones on my old Signum (half CAN car) had a motor positioned vertically that folded the mirrors in the bit that stuck out the door.
BUT what it also had that you will need to get round is a 'door module' (drivers door module, DDM & passenger door module, PDM) that told the mirrors to fold when you held the lock button on the fob or pressed the mirror adjustment button on the drivers door card.
Also the passenger side mirror would dip to show the kerb when reverse was engaged.
The annoying bit was they only unfolded on pressing the button on the drivers door not when you unlocked the car.
So to do it on an Omega I'm guessing you neeed the motorised mirrors, loom, DDM & PDM, door switch and a bucket load of luck as chances are as t was only available in LHD the loom, switches and blind spot (and photochromatic) mirror will be wrong for a RHD car.
TL;DR
Not worth the hassle for any real gain
:-)